.container {
    padding-left: 350px;
    box-sizing: content-box;
    padding-right: 100px;
}

.menu {
    width: 300px;
    height: 100%;
    position: fixed;
    display: flex;
    flex-grow: 1;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    left: 0;
    top: 0;
}

.menuContainer {
    flex-grow: 2;
}